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Turn signals flash fast after installing flat bed with led lights

After installing a new flat bed with led lights, my turn signals flash to fast.there are two black wires on the truck that I couldn't find a place for.

Posted by Anonymous on


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Posted on Jan 02, 2017

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SOURCE: no running lights when head lights are on

the brown wire on your suburban will be your park lights and the yellow will be brake/turn are you sure the green wire is ground on your led lights? i would think the black wire would be ground

Posted on Nov 25, 2008

  • 1 Answer

SOURCE: 2003 Chevy S10 Pickup fast flashing signal lights

like he said check you brake box to though. we did that and the wires to the brake box came loose.

Posted on Apr 21, 2009

  • 52 Answers

SOURCE: Left turn signal blinks fast in rear and regular in front

the bulb is blown out. you need to change it. also if the bulb is not blown out or if the blinker still blink fast after you change the bulb then you have a ground problem. just remove that blinker light and check the ground wire on it. if you need to replace it and find a good groun on the car. you should be fine. this is all it is .

Posted on Jun 04, 2009

  • 4 Answers

SOURCE: 1994 Chevrolet K1500 pickup: wiper and turn-signal problems

My wipers were doing very strange things like you have suggested. I removed the outer cover from the wiper motor and inspected the solder joints. There were at least three cracked solder joints. I took out my soldering iron and re-soldered ALL if the connections on that board, no need to remove the wiper motor from the truck. After that, I haven't had a single problem.

A flasher will flash quickly when a bulb is burnt or not drawing power. Check to see if there is damage to a wire at the right rear signal, or if you have power there. If you put in a new bulb and it does not light, there is likely a wire issue somewhere near that light. Make sure the contacts are not corroded or this will cause the same problem.

Posted on Aug 12, 2009

  • 14036 Answers

SOURCE: 1994 Chevy truck. Turn signals do not work.


Posted on Sep 22, 2009

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1 Answer

I installed rear led turn signals and the left one flashes good for three times they starts flashing fast the right is fine

left side front bulb may be bad...the fast flash usually indicates this. Hope this helps.

Jun 09, 2015 | Cars & Trucks

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Replacing the turn signal flasher relay. I have installed LED bulbs and get the extremely fast turn signal flashes. I have a relay but can not find where to install it

If its flashing really fast and all lights on the circut are working you may need a heavy duty flasher as to location,depends on vehicle but they are usually close to the under dash fuse panel

Apr 28, 2015 | Cars & Trucks

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Installed LED turn signal lights. Turn signal now blinks too fast. Solution

Hi Dennis
the indicator blinking fast because the LED use less AMP then ordinary bulb, I know an old trick to solve this problem is to connect an extra bulb to each rear indicator by running an extra wires from the light connector to an extra bulb holder.
Good Luck

Mar 02, 2014 | Cars & Trucks

1 Answer

Turn signals flash too fast after changing to LED

Instead of that, see if you can get an electronic flasher unit for your vehicle that does not depend on the turn signal light load (amps) to control flashing speed. This is much simpler than splicing things into wires.

Jan 05, 2014 | 1999 GMC Sierra

1 Answer

Front turn signals work but flash fast, nothing works in back lights at all

pull the positive wire of your battery wait bout ten to fifteen secs put it back on this will reset your computer

Feb 09, 2013 | GMC Sonoma Cars & Trucks

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Turn singales flash to fast

Might have to add a heavy duty flasher. Or u have a short or one of the other blubs burnt out. Check all lights.Check your wiring.

Jun 13, 2012 | 2001 GMC Sierra 2500HD

1 Answer

Rapidly flashing turn signal continues even after I replace bulb

And all lights flash? Is this with or without a trailer and its lights connected? LED lights installed?
Many times when there is a slow or fast rate that the signals flash its due to a chaneg in current being drawn. Either from hooking up trailer lights or changing the bulbs to LED. LEDs will draw less currenct and more lights more current.
There are electronic flashers that automaticaly adjust for different current draws to make the lights flash at a normal rate and they plug right in to replace your stock mechanical flasher.

Aug 30, 2011 | 2002 Chevrolet TrailBlazer

2 Answers

Changed my bed to a utility bed, added back up and tail lights and i cant get the running tail lights to work. also the turn signals click fast like one is burned out but isnt. at this point i cant drive...

There May be a faulty ground. Re-check your ground or add another wire to ground them. Check all your connectors for corrosion or connectivity. Use some dielectric grease on the connectors to prevent loss of connection and corrosion. The turn signal flasher might need to be changed to a heavy duty one, if there are more lights than stock.

Mar 24, 2010 | 2000 Ford F350 Super Duty Super Cab

1 Answer

Fast Turn Signals

I believe your aftermarket headlights have leds as your signal lights. They are now flashing faster because your electronic flasher module / unit is designed to measure current resistance to regulate the flash interval. As LED lights draw much less power than filament bulbs, the module thinks the lights are burnt out. Your hazards work on a timer to flash at intervals and does not work on the resistance.

You will need to replace the electronic flasher module / unit with one that is rated for LED. This unit should be under your dash near your steering column and will be labeled. The new one you replace it with should have LED stamped on it.

Oct 05, 2009 | 2000 Chevrolet Impala

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